tanjiro POV
2 week past we've been on a lot of mission it was weird that zenitsu could heal so fast though he hadn't eaten any humans we were assigned a mission with rengoku the flame hashira to kill the demon on the train kaigaku zenitsu and inosuke came with me and rengoku we went on the train it was night so zenitsu was out sitting next to his brother swinging his legs nezuko stayed in her box a few mintues past and i blacked out..............................................................................
no ones POV
nezuko and zenitsu were out of there boxes trying to wake there siblings nezuko slammed her head aganist tanjiro head her head started bleed tears formed in her eyes she slammed her head back into her brother zenitsu just stared confused tanjiro woke up and looked at nezuko then zenitsu he went to go wake up rengoku when all of a sudden a girl with black hair started wing a knife at him he was strugling to dodge them zenitsu cut his hand and shocked his brother his brother bolted up and looked at him.........................................................................................
kaigaku POV
i woke and realized i was in snow i stood up and saw my brother his hair in a bun and it was natrual color with no yellow ends oni chan zenitsu said and started to cry his hair came out of a bun and flew with the wind oni chan u have to wake ONI CHAN zenitsu said while crying i bolted awake i saw my little brother and nezuko i saw tanjiro being attacked by a girl zenitsu knock her out i said he ran quickly past tanjiro and nezuko and behind the girl knocking her out zenitsu caught her and put her back in her seat nezuko burned the ropes and rengoku and the other went to find the demon while nezuko and zenitsu had to protect the humans
no one POV
the things wrapped around zenitsu arm making him fall on his knee he try to break to free but he was going to rip his arms off nezuko was too far zenitsu couldn't get free his muzzle became loose it fell of his mouth the things started to squeeze tighter he then screamed in pain out of no where the things were cut freeing zenitsu and zenitsu saw nezuko he smiled at her nezuko put his muzzle back on and the thing suddenly dissappered and zenitsu and nezuko went to find there brothers they saw demon with pink hair suddenly they watch there brothers and rengoku and inosuke fly threw a hole in the train leading outside they jumped with them and they rolled across the ground zenitsu landed on his back and nezuko landed on her stomach zenitsu! kaigaku yelled running to zenitsu zenitsu just looked at him confused nezuko got up and went to her brother checking him they then saw upper moon 3 they watched akaza kick rengoku than inosuke tanjiro ran into the battle so did kaigaku they were fight akaza tanjiro had got badly wounded nezuko got mad and turned bigger and a horn grew in she stomped akaza kicking she then kick towards rengoku who cut his head off nezuko saw kaigaku bleeding and try to attack but tanjiro stop her bye putting his sword in her mouth she was squirming and struggling tanjiro had began to sing a song zenitsu went up and touched her head she had a flashback of her mother and family she started to cry and started to shrink back to her regular and the horn she curled up in a ball and went to sleep tanjiro put another bamboo her mouth and we went back to the butterfly esate with rengoku he is alive
this au zenitsu and kaigaku had a older sister who use to be friend with muzan before she died she had moon breathing i will show u how she looks word count:693
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two birds on a wire(sibling kaigaku and zenitsu)
Fanfictionhi my names kaigaku my younger brother zenitsu turned into a demon when we were on a mission zenitsu been a demon for 2 months we go to the moutian to fight the spider family we fought a boy name rui with a guy named tanjiro he had demon in a box...